To all: Thank you for your answers, it's clear to me now.
Fiwit, I live in the eastern part of Belgium, near the German boarder and it's the only part of Belgium in zone 6, the rest of the small country is zone 7 or 8. I'm Dutch, but moved to Belgium 8 years ago.
Valleylynn, there are already some pictures from plants in my garden in the Plant Database. Hope to add more soon.
The picture shows a part of my garden.
